MMC整流器开关器件的损耗及温升建模研究
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TM461

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国家电网有限公司科技项目"船舶岸电快速连接、运行安全保障及检测关键技术研究及应用"(SGJS0000YXJS1800284)


The loss and temperature rise modeling of MMC rectifier switching devices
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    摘要:

    适用于环境保护需求,替代船上柴油发电机发电的岸电系统蓬勃发展。应用于岸电系统的模块化多电平整流器工作时温升过高会降低其运行可靠性,损耗是反映其温升的重要参数。在忽略整流器其他损耗因素情况下,针对开关器件的损耗建立简化模型,并结合电热转换原理建立模块化多电平变换器(MMC)整流器半桥子模块开关器件的温升分析模型,从而确定温升与开关器件损耗的关系式。基于建立的损耗及温升模型,仿真分析载波移相和最近电平逼近2种调制方式对开关器件温升的影响,与实际工程条件下的验证一致。结果表明载波移相调制方式下开关器件温升更小,实际工程中选用该调制方式可以在一定程度上抑制温升。文中搭建的温升模型可为后续研究其他温升抑制措施提供模型依据,可验证温升抑制措施的有效性。

    Abstract:

    The onshore power system which is suitable for environmental protection needs and replaces diesel generators on board is booming. The high temperature rise of modular multilevel rectifier applied to the onshore power system reduces its operating reliability, and the loss is an important parameter to reflect the temperature rise. Ignoring other loss factors of rectifiers, a simplified model is established for the loss of switching devices, and a temperature rise analysis model of modular multilevel converter (MMC) rectifier half-bridge sub-module switching devices is established in combination with the principle of electro-thermal conversion, so as to determine the relationship between temperature rise and switch device loss. Based on the established loss and temperature rise model, the influence of carrier phase shift and nearest level approach modulation on the temperature rise of the switching device is simulated and analyzed, which is consistent with the verification under practical engineering conditions. The results show that the temperature rise of switching devices is smaller under the carrier phase shift modulation mode, and the mode of modulation is able to be used in the actual engineering to suppress the temperature rise to a certain extent. The temperature rise model constructed can provide a model basis for the follow-up study of other temperature rise suppression measures, and can verify the effectiveness of temperature rise suppression measures.

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余昆,薛卜,顾昉渊,阮文俊. MMC整流器开关器件的损耗及温升建模研究[J].电力工程技术,2021,40(4):18-25

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  • 收稿日期:2021-03-04
  • 最后修改日期:2021-05-22
  • 录用日期:2021-01-28
  • 在线发布日期: 2021-08-11
  • 出版日期: 2021-07-28
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